Meritline offers the DFL 25-oz. Reusable Stainless Steel Water Bottle
in Red for $7.99. Coupon code "MLCKA10ZNL1" cuts it to $3.99
. With free shipping
, that's the lowest total price we could find by $6, although we saw it for a buck less in January. It features a screw-top lid and carabiner. It's not dishwasher- or microwave-safe. Coupon expires after 300 uses.